Long persistent phosphors and persistent energy transfer technique

Overview

Information

Number
6953536
Application
10/374696
Filing date
02/25/2003
Issue date
10/11/2005
Inventor(s)
William M. Yen, Dongdong Jia, Weiyi Jia, Xiao-jun Wang
US Classification
252/301.4F; 252/301.4R
View at USPTO

Citations

University of Puerto Rico (2)
Sony (1)
DALIAN LUMINGLIGHT CO. (1)
Nemoto & Co. (1)
GTE Sylvania (1)
OSRAM Sylvania (1)
General Electric (1)
Ohara (1)
SamSung Electronics Co. (1)
Nichia (1)
Nichia Chemical Industries, (1)
GTE Products (1)
Sarnoff (1)
Toshiba (1)

Abstract

Abstract

The invention provides long-persistent phosphors, methods for their manufacture and phosphorescent articles. The invention also provides a method for generating a long-persistent phosphorescence at a selected color. The phosphors of the invention may be alkaline earth aluminates, alkaline earth silicates, and alkaline earth aluminosilicates. The phosphors include those activated by cerium. The phosphors also include those in which persistent energy transfer occurs from a donor ion to an acceptor ion, producing persistent emission largely characteristic of the acceptor ion.

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UNIVERSITY OF GEORGIA, THE (2)
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Tech Analysis

Class Subclass Type Reference Factor Citation Factor Strength Grant time Early grant (%)
252 301.4F Emerging Average Seminal Medium Average 50.4
252 301.4R Emerging Average Seminal Medium Average 50.4